Octopus Head – Nick ponders whether he wants his Grimm abilities back as he and Hank continue to track a Wesen that’s stealing memories from its victims. Meanwhile, Adalind learns she has a connection to Nick; and a recovering Capt. Renard has a mysterious visitor.
Thanks for the Memories – Nick adjusts to the loss of his Grimm powers and tries to figure out how to deal with Trubel as the fourth season opens. Meanwhile, Wu has an unpleasant flashback; a new group of Wesen come to Portland and steal people’s memories; Capt. Renard fights for his life; and Adalind’s desperation to find her child lands her in Prince Viktor’s clutches.
Blond Ambition – The third season ends with the arrival of Monroe and Rosalee’s wedding day. Meanwhile, Nick and Juliette come to a surprising realization that could have lasting effects on their relationship; and Adalind’s actions have disastrous consequences.
The Inheritance – Nick and Hank investigate a double homicide that’s linked to the Verrat. Meanwhile, Trubel meets a father-and-son team who traveled a great distance to find “the Portland Grimm”; and Renard grows suspicious of Adalind’s behavior.
My Fair Wesen – Nick and Hank introduce Trubel to her new world by taking her on a ride-along, during which they investigate the murder of a young woman. Elsewhere, Adalind makes a discovery that may help her reclaim something she lost.
Nobody Knows the Trubel I’ve Seen – Nick and Hank are on the case when a deadly female comes to town and attacks members of the Wesen community. Meanwhile, Adalind considers teaming up with a new and dangerous ally.
The Law of Sacrifice – Nick and his mother step in to protect Adalind’s baby while Prince Viktor enlists a dangerous ally to help him find the child.
Synchronicity – An unexpected ally swoops in to ensure that Adalind and her baby get out of Europe safely. Back in Portland, Monroe and Rosalee throw themselves into wedding-planning details; and Nick and Juliette remember their failed proposal.
The Show Must Go On – Monroe and Rosalee go undercover at a traveling carnival that’s linked to a double homicide. Meanwhile, Monroe asks Nick an important question pertaining to his upcoming nuptials; and a member of the Resistance goes all in to help Adalind.